Staining ink



patented Oct. 22, 1929 UNITED STATES WILLIAM G. SCHROEDER, OF HARRISBURG, PENNSYLVANIA, ASSIGNOR TO INDELIBLE COLORATION CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF NEW-YORK STAINING INK No Drawing. Application filed March 29, 1922, Seria1 No. 547,820. Renewed February 4, 1929.

This invention relates to the art of printact of printing it thereon direct, .and then in subjecting the printed material to a temperature sufliciently high to fuse the ink imposed thereon and render the surface of the material capable of absorbing the fused ink to the extent that the ink penetrates the material, thereby representing the printed impression thereon in ineradicable fashion, and without presenting any excrescence from the surface.

In carrying out my invention I provide a fusible ink which is composed of a suitable vehicle that is impregnated with varlous metallic oxides, such for example as manganese, cobalt, uranium, etc., to furnish the desired color.

The base of the vehicle employed by me may be linseed oil, which is to be boiled and to have the scum removed therefrom wh1le boiling. During the boiling operation certain other ingredients are to be added, namely, red lead, balsam of sulphur, Barbados tar, capivi balsam, oil of amber, acetate of lead and rosin.

This composition has been found by me in practice to constitute a satlsfactory vehlcle for the metallic oxides in the production of my fusible printing ink, and have also found in practice that the vehicle may 1nclude the said ingredients in substantially the following proportions.

Ounce Linseed oil l- 16 Red lead 2 Balsam of sulphur 4 Capivi balsam Barbados tar 4 Oil of amber Acetate of lead Rosin it desirable to boil said vehicle I have found the'linseed oil for about two'hours, carefully removing the scum that maybe thrown up, adding red lead, and burning off all greasy particles. The other named ingredients are also added to the linseed oil While boiling.

Following the boiling the vehicle is allowed to simmer, and while simmering the metallic oxide is added to provide the desired coloring matter, thereby completin the preparation of the ink, which may thenbe allowed to cool, and ground in a printing ink mill, when it will be found to have a consistency suitable for printing ink.

The ink thus prepared may then be applied to the surfaces of such substances as vitrics, ceramics, metals, metallic alloys and other hard fusible materials, the method of application being such as is generally known in 7 the printing arts; although it will be appre ciated that, since the printing is to, be performed on hard surfaces, the impressing medium by which the ink is to be transmitted to such surfaces is preferably of relatively soft material.

In this act of printing, the inked impression is deposited upon the hard surface in the same manner as types or other printing media would impose impressions, with ordi nary printing ink, upon paper.

The hard fusible material, thus printed, is then subjected to heat at a suficiently high temperature to fuse the ink, which also serves to heat the hard, fusible material, bearing 5 the printed impression, to a point at which it" permits surface absorption of the fused ink, somewhat in the same manner as a stain is absorbed by wood.

The temperature at which I have successfully fused my improved ink to amalgamateit with the surface of hard, fusible material has been about 450 F. All the organic ingredients of the ink will have been completely consumed before this temperature is reached, leaving only the unvolatilized me tallic elements, including the pigments employed, as representative of the prepared ink in the finished product.

While I have referred to my improved im- In preparing the pression creating material as an ink, being warranted in so styling it on account of its facility of application being comparable to that of ordinary printers ink, I am equally entitled to refer to this product as a stain, v because, under fusion, it adapts itself to surface absorption by hard fusible materials somewhat as ordinary stain does With Wood. Therefore I believe it appropriate to identify my improved ink product as a fusible staining-ink, and also to identify the new art Which has come into being through the new material, as the art of stain-printing on hard fusible materials.

Variations Within the spirit and scope of my invention are equally comprehended by the foregoing disclosure.

I claim A fusible staining-ink composed of mineral oxides having as a vehicle linseed oil with Which are compounded, red lead, balsam of sulphur, Barbados tar, capivi balsam, oil

of amber, acetate of lead and rosin.

Signed at the borough of Manhattan, in

a the city, county and State of New York, this 27thday of March, 1922.

I WILLIAM C. SCHROEDER. 

